There are 2 companies tagged `microtransactions`; raised $42.3M from 10 investors
Live Gamer raised $36.3M from Charles River Ventures, Kodiak Venture Partners, Charles River Ventures, Kodiak Venture Partners, and FirstMark Capital in 4 rounds.
Virtual Goods Gaming Marketplace Live Gamer Raises $8.5M 
techcrunch.com
SEC D 
sec.gov
Live Gamer Raises $2.8 Million In Funding 
paidcontent.org
http://www.livegamer.com/hotnews.php?id=1 
livegamer.com
Jambool raised $6M from Madrona Venture Group, Bay Partners, The Hit Forge, Charles River Ventures, and Bay Partners in 2 rounds.
Jambool Raises $5 Million For Its Social Gold Micropayments Platform techcrunch.com
Jambool Focused on Payments Platform for Virtual Goods, Launches Payments Widget for Facebook Applications 
insidefacebook.com